Add include guards to header files

3 files changed, 15 insertions, 0 deletions

diff --git a/elisp.h b/elisp.h
index 026db90..88edd00 100644
--- a/elisp.h
+++ b/elisp.h
@@ -1,3 +1,6 @@
+#ifndef ELISP_H
+#define ELISP_H
+
 #include "vterm.h"
 #include <emacs-module.h>
 
@@ -42,3 +45,5 @@ void erase_buffer(emacs_env *env);
 void insert(emacs_env *env, emacs_value string);
 void goto_char(emacs_env *env, int pos);
 void toggle_cursor(emacs_env *env, bool visible);
+
+#endif /* ELISP_H */
diff --git a/utf8.h b/utf8.h
index 4acf955..8ec5f3e 100644
--- a/utf8.h
+++ b/utf8.h
@@ -1,3 +1,6 @@
+#ifndef UTF8_H
+#define UTF8_H
+
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -5,3 +8,5 @@
 size_t codepoint_to_utf8(const uint32_t codepoint, unsigned char buffer[4]);
 bool utf8_to_codepoint(const unsigned char buffer[4], const size_t len,
                        uint32_t *codepoint);
+
+#endif /* UTF8_H */
diff --git a/vterm-module.h b/vterm-module.h
index 02f32af..25ea860 100644
--- a/vterm-module.h
+++ b/vterm-module.h
@@ -1,3 +1,6 @@
+#ifndef VTERM_MODULE_H
+#define VTERM_MODULE_H
+
 #include <emacs-module.h>
 #include <inttypes.h>
 #include <stdbool.h>
@@ -36,3 +39,5 @@ static emacs_value Fvterm_set_size(emacs_env *env, ptrdiff_t nargs,
 
 static void *event_loop(void *arg);
 int emacs_module_init(struct emacs_runtime *ert);
+
+#endif /* VTERM_MODULE_H */